content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.impl.EmptySubscription;
  
  import java.util.*;
  import java.util.concurrent.Flow;
  
  public final class FolyamOrderedMergeIterable<T> extends Folyam<T> {
      final Iterable<? extends Flow.Publisher<? extends T>> sourcesIterable;
  
      final Comparator<? super T> comparator;
  
      final boolean delayErrors;
  
      final int prefetch;
  
      public FolyamOrderedMergeIterable(Iterable<? extends Flow.Publisher<? extends T>> sourcesIterable,
                           Comparator<? super T> comparator,
                           int prefetch, boolean delayErrors) {
          this.sourcesIterable = sourcesIterable;
          this.comparator = comparator;
          this.prefetch = prefetch;
          this.delayErrors = delayErrors;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      protected void subscribeActual(FolyamSubscriber<? super T> s) {
          Flow.Publisher<? extends T>[] array = new Flow.Publisher[8];
          int n = 0;
          try {
              for (Flow.Publisher<? extends T> p : sourcesIterable) {
                  if (n == array.length) {
                      array = Arrays.copyOf(array, n << 1);
                  }
                  array[n++] = Objects.requireNonNull(p, "a source is null");
              }
          } catch (Throwable ex) {
              FolyamPlugins.handleFatal(ex);
              EmptySubscription.error(s, ex);
              return;
          }
  
          FolyamOrderedMergeArray.subscribe(s, array, n, comparator, prefetch, delayErrors);
      }
  }
  